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    <head>
        <meta charset="UTF-8">
        <title>浮动框架应用</title>
        <style type="text/css">
            a{width: 300px;margin: 0 10px;}
            div{margin: 0 auto;text-align: center;}
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        <div id="" class="">
            <h3>浮动框架中打开新页面</h3>
            <iframe name="left" src="http://www.pku.edu.cn" width="300" height="300"></iframe>
            <iframe name="right" src="http://www.tsinghua.edu.cn" width="300" height="300"></iframe>
            <p>
                <a href="http://www.bing.com" target="left">在左边浮动框架中打开bing网页</a>
                <a href="http://www.csdn.net" target="right">在右边浮动框架中打开csdn网页</a>
            </p>
        </div>
    </body>
</html>